May sweeps is upon us, which means plenty of big-name guest stars invading your favorite TV shows. You can’t possibly watch them all (we know; we’ve tried), so here’s a quick and easy guide to which guest stars you need to tune in for… and which you can skip. — Dave Nemetz, Yahoo! TV

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"Lucky Guy" Broadway Opening Night - Arrivals & Curtain Call

NEW YORK, NY - APRIL 01: Actor Colin Hanks attends the "Lucky Guy" Broadway Opening Night at The Broadhurst Theatre on April 1, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images)